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The HI-H 2 Transition and Star Formation in Early-Type Galaxies

The HI-H 2 Transition and Star Formation in Early-Type Galaxies

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ρs is constant over Hg?<br />

s>>Hg<br />

H<br />

Koyama & Ostriker (2009) derive an approximate solution of<br />

the equations of hydrodynamic equilibrium us<strong>in</strong>g a 2 nd order<br />

Taylor series expansion.<br />

Azimuthal symmetry<br />

σ<br />

g(R)=?<br />

ρs>>ρg?<br />

?<br />

15

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